What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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sussex.ac.uk

https://sussex.ac.uk· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

sussex.ac.uk

Mobile

Sponsored

Hosting Provider

Computing Service

IP Address

139.184.14.208

Server Location

🇬🇧 London, United Kingdom

ASN

AS786

Server

Apache

Nameservers

ns2.susx.ac.uk.ns3.susx.ac.uk.dns0.cs.bham.ac.uk.ns1.susx.ac.uk.

Performance

Page Speed

1.1 MB

16 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Computing Service

Technology Stack

3 Technologies Detected

Libraries

jQueryv3.6.0

CSS Frameworks

Tailwind CSS

Web Servers

Apache

SEO Analysis

C67/100

sussex.ac.uksussex.ac.uk

University of Sussex - a leading, research-intensive university

Choose from over 500 undergraduate and postgraduate courses and degrees at a highly ranked, research-led university in Brighton, UK.

Title Length63 chars

Recommended: 50-60 chars

Description Length132 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

109 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

237d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

08.10.2025

Valid Until

08.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.sussex.ac.ukm.sussex.ac.uksussex.ac.ukwww.susx.ac.uk

SHA-256 Fingerprint

45:74:37:D1:F7:74:7D:C8:D4:86:AB:39:DB:2D:14:04:9F:67:D6:EA...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 300s(max-age=300)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

7784

content-type

text/html; charset=UTF-8

date

Fri, 13 Feb 2026 19:54:18 GMT

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

eu-smtp-inbound-1.mimecast.com

eu-smtp-inbound-2.mimecast.com

Domain Information

sussex.ac.uk

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Georgia + Arial

83/100

Readability

/30

40/40

16px · LH 1.60

Hierarchy

/20

18/25

2.8x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Georgia

Serif45px

Body Font

Arial

Sans16px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

45px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok

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Last analyzed: 13 Feb 2026 at 19:54

Historical Analysis & Change Tracking